Lip turning machine



Oct. 27, 194-2. BERTRAND 2,299,788

LIP TURNING MACHINE Filed July 30, 1940 4 Sheets-Sheet 1 Oct. 27, 1942. E ND 2,299,788

' LIP TURNING MACHINE Filed July 30, 1940 4 Sheets-Sheet 2 0a 27, 1942. F, ERTRAND 2,299,788

LIP TURNING MACHINE Filed July so, 1940 4 Sheets-Sheet s Oct. 27, 1942. BERTRAND 2,299,788 7 LIP TURNING MACHINE Filed July 30, 1940 4 Sheets-Sheet. 4

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UNITED STATES PATENT OFFICE LIP TURNING MACHINE Frederic E. Bertrand, Lynn, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application July 30, 1940, Serial No. 348,531

34 Claims.

This invention relates to lip-turning and slashing machines and is herein disclosed as embodied in a machine for operating upon solid leather insoles of the shoulder type for welt shoes. It is to be understood, however, that the invention is not limited to use with this type of work, being also applicable to lip-turning and slashing operations on other types of sole members.

In the preparation of one type of solid leather insole, after the inner and outer channels have been cut, the lip of the outer channel is turned back upon the adjacent surface of the insole above the between-substance and set in this position so as to form a shoulder with the feather of the insole. In performing this operation difficulities arise, particularly where the lip is heavy or of such a character that it tends to return to its original position, in retaining the lip in its turned-back position and in producing the desired straightness of shoulder necessary for the satisfactory use of the insole in subsequent shoemaking steps. Ihe scufiing-up and, in some cases, the actual tearing of the leather which frequently occurs in machines for performing this operation is also troublesome because of the damage to the workpiece, as well as the resulting dust and dirt around the machine. The handling of work pieces in which the outer channel is, in certain locations, spaced inwardly a considerable distance from the edge, as, for example, insoles having a wing or cookie at the shank, is difficult, and practically impossible in machines hitherto proposed, due to interference of the part projecting beyond the channel with operative elements or other adjacent parts of the machine. Also, close attention and considerable effort is usually required of the operator in guiding the work piece during these operations, and the slowing-down 'or interruption in the feeding of the work piece, often caused by interference of the lip-turning tools with the feeding means, results in inefficiency and lowered output.

A principal object of this invention is, therefore, to provide an improved machine which is capable of turning channel lips in a satisfactory manner on even the heaviest and most diflicult to work materials, and also capable of producing a straight shoulder between the turned-back lip and the feather. With this object in view, a feature of the invention is the provision in a machine of this type of improved means for turning the channel lip, comp-rising separate li raising, lip-turning, and lip-setting means, arranged to operate in sequence, together with means for by the pounding means, to prevent bulging or distortion of the lip material and insure straightness of the shoulder formed.

Another object of this invention is the provision of an improved machine of the aforementioned type in which scuffing or tearing of the leather is avoided, and to this end a feature of the invention comprises a novel arrangement of the operative elements to function while the workpiece is held stationary and thereafter to move with the workpiece during feeding thereof, thus avoiding relative movements of these elements and. the workpiece which might result in damage to the latter.

It is also an object of the invention to provide a machine for'operating upon the channel lips of work pieces having portions projecting beyond the channel lip, and a further feature of the invention is to be found in a novel arrangement of the work supporting means and of the operative elements on the machine so as to provide ample clearance space for such projecting portions without interference with the moving parts, or obstruction by portions of the machine itself.

Further objects of the invention are to simplify the operation and increase the output of machines of this type. With these objects in view, additional features of the invention include, the construction and arrangement of certain of the operative elements in such a manner that the Work piece is at all times securely held in the machine, and, during its progress therethrough, is subjected to forces tending to hold it against appropriate guiding surfaces; and the mounting of the operative elements to move together and with the Work piece, in the direction in which it is being fed, thus avoiding interference with or slowing down of the feeding operation.

In the turning back and setting of channel lips, slashing of the lip is sometimes found to be necessary in certain portions thereof Where the channel is curved. Slashing is not, however, necessary or desirable in other portions of the lip, and frequently a single slashing cut, at a particular point, is all that is needed. Accordingly, a still further object of this invention is the provision, in a lip-turning machine, of an improved means for selectively slashing the lip during the lip-turning and setting operations, and another feature of the invention resides in a novel lipslashing mechanism which is operable at the will of the operator, and as the machine is operating, to perform a series of lip-slashing cuts in a selected portion of the lip, or to make a single cut backing-up the lip, while it is being operated upon at a desired point.

The above and other objects and features will become evident from the following detailed description of the illustrative embodiment of the invention shown in the accompanying drawings, and will be pointed out in the appended claims.

In the drawings:

Fig. 1 is a View in side elevation of a machine embodying the invention, with certain parts broken away to show the interior construction;

Fig. 2 is a perspective view of the front portion of the machine;

Fig. 3 is an exploded view of one of the operating parts of the machine;

Fig. 4 is a side elevation of the front end of a swinging head forming a part of the machine and certain of the operative elements carried thereby;

Fig. 5 is a View similar to Fig. 4 but showing other operative elements also carried by the swinging head;

Fig. 6 is a View of portions of the operative elements shown in Fig. 4 but with these elements in a different operating position;

Fig. 7 is a rear elevation of the main operating mechanism of the machine; and

Fig. 8 is a diagrammatic plan view showing a work piece and the relative positions of the several operative elements of the machine with respect to each other and to the work piece when the swinging head is in its mid-position.

Referring to Fig. 1, the illustrated machine has a base ill on which is supported a frame l2, hollowed out to form a chamber 14. This chamber, which is arranged to enclose the main operating mechanism of the machine and also to serve as a reservoir for lubricant, is closed at its top by means of a cover l6, secured in place by screws l 8. Extending forwardly from the lower portion of the front of the frame is a short column 22, forming part of a bracket 20 which is secured to the frame by means of screws 24. This column provides a support for a work table 26, against which the work piece is clamped during the operation of the machine.

The table is rotatably mounted on a platform 30 by means of a central stud, not shown, and a ball thrust bearing 28, including a lower race member 29, and the platform is in turn carried on the upper end of a post 32 which is slidably mounted in the column. A pin 34, extending downwardly from the bottom surface of the platform 30, engages a hole 3| in the column 22 to prevent rotation of the post 32 and platform 30. This post is urged upwardly by a strong compression spring, not shown, against a stop collar 36 threaded to a rod 38 which is secured to the lower end of the post within the column. The uppermost position of the post, and also of the platform 30 and table 26, is determined by the setting of an adjustable abutment sleeve 40, threaded into the lower end of the column 22, through which the rod 38 projects. A chain 42, connected to a foot treadle, not shown, affords a means for depressing the work table when a work piece, such as the insole S, is being placed in the machine.

The operative elements of the machine comprise, a presser foot 44 for holding the insole between feeding movements, an edge ga e 46, a plow 48 for raising the lip, or flap, of the outer channel of the insole, a'wiper 5D for turning back the raised lip, a hammer 52 for pounding down the turned-back lip and pressing it against the adjacent surface of the insole above betweensubstance, and a knife 54 for slashing the turnediqzmi, 106

back and pounded-down lip. These operative elements and their relative positions are clearly illustrated in Figs. 2 and 8 of the drawings, and, with the exception of the presser foot, which is mounted on the frame 12, are all carried by a swinging head 68 that is oscillated to impart to these elements forward and backward movements, see arrows (Fig. 8) As will be explained below, these movements of the hammer are utilized to feed the work piece, herein illustrated as the solid leather insole S, having a wing W at the shank and inner and outer channels, see Fig. 1. The knife is selectively operable so that slashing of the lip may be effected at any time during the operation of the machine at the will of the operator.

The arrangement of the operative elements on the forwardly extending portion of the swinging head 68 and the position of the work table 26 is such as to provide a wide clearance space 3l2, between the table and the front of the frame l2, so that this machine can readily accommodate work pieces in which the channel, the lip of which is to be operated upon, is spaced a considerable distance from its margin, as is the case in the insole illustrated, the wing portion W of which projects into this clearance space. These operative elements are als'oarranged directly above the supporting means for the table 26, the roller bearing 28, and close to the center of the supporting post 32, so that there is a minimum overhang of the table at the point where it must sustain working pressures.

The insole is progressively fed through the machine to effect a raising-up of the lip of the outer channel by the plow and to present the raised lip to the other operative elements, by means of the conjoint action of the hammer and the presser foot in the following manner. During the forward movement of the hammer, which is then elevated above the insole, by means of mechanism about to be described, the presser foot 44 is held firmly against the body of the insole just inside of the inner channel, see Fig. 1, and the insole is thus clamped against the upper surface of the table 26 and held stationary thereon. The edge gage 46 and plow 48, which move with the hammer, slide over the upper surface of the feather F, and the plow raises the lip of the outer channel during this forward movement of the hammer. As the movement of the hammer is reversed, the presser foot is elevated. thus releasing the insole for backward movement with the hammer, which has now descended to pound the lip and to hold the insole firmly against the upper surface of the rotatable work table 26. Just before this backward movement is reversed the presser foot again descends and clamps the insole to hold it fixed while the elevated hammer moves forwardly for the next feeding step. The holding actions of the hammer and presser foot are preferably overlapped so that the insole is at all times held securely against the table.

As the presser foot descends to clamp the insole it swings about a center located above its point of contact and thus has a horizontal motion which tends to urge the insole inwardly against the plow and edge gage. Also, as the insole is fed bv the backward movement of the hammer, the table 26 will be turned on the platform 30 in the direction of the dotted arrow, Fig. 8, so that the insole is swung toward the edge gage and plow by the frictional drag on its lower surface. Thus,

the shoulder formed by the raised lip is held automatically against the guiding edges of these elements, see Figs. 1 and 8, and consequently very little effort is required of the operator in guiding the insole as it passes through the machine.

The edge gage 46 and plow 48 are joined by a web 41 and are formed as forwardly projecting portions of a U-shaped element 60 which is secured to the lower end of a rod 62 by means of a clamping screw 64, see Figs. 5 and 8. This rod is slidably mounted in a forwardly projecting bracket 66, forming a part of the swinging head 68, and is held against rotation by means of a bifurcated ear I0 embracing the base I2 of an overhanging arm I4 which is secured to the bracket by means of a screw I6. An adjusting screw I1 bears against the upper end of a compression spring 18 received within a bore 80 in the upper end of the rod 62. The spring 18 is relatively light as compared to the strength of the spring which holds the work table 26 in its uppermost position and the pressure of the edge gage 46 and the plow 48 upon the work, imposed by this spring, may be nicely regulated through the adjusting screw so that the lower surfaces of the edge gage and plow slide readily over the upper surface of the feather F of the insole, and the extension thereof at F, but with sufiicient downward pressure to effect proper turning-up of the lip by the plow.

The aforementioned forward and backward movements of the hammer are obtained by swinging the head 68, on which it is mounted, and to this end the head is journaled on a vertical shaft 82, secured at its upper end to the frame I2 by means of a set screw 84, and supported at its lower end in a thrust bushing 86. The bushing receives the lower end of the shaft 82 and is adjustably secured in the frame by means of a set screw 88. The head 68 has a cylindrical nose 90 which projects rearwardly through an opening 92 in the wall of the frame into the chamber I4. Slidable in a vertically extending bore 94 on the inner end of the nose 90, is a cylindrical block 96 which is drilled to receive an eccentric pin 98, mounted on the outer face of an eccentric block I00 and projecting through a clearance opening 99 in the nose 90. This eccentric block is secured, by means of a stud I03, to a main drive shaft I02 which is rotatably mounted in a bushing I04 in a bearing boss I06 on the rear wall of the frame I2. Also secured to the main shaft is a pulley I08 which is driven by means of a belt IIO from any suitable power source.

In the positions of the parts as shown in Figs.

1 and 7, the hammer is elevated and in the midpoint of its forward movement, with the pulley I08 rotating in a clockwise direction, as viewed in Fig. '7. As the shaft continues its rotation the forward portion of the head 68, which carries the hammer, will be oscillated back and forth from its central position, represented by the line YY, Fig. 8, to impart to the hammer its forward and backward movements. As previously explained, the presser foot 44 is periodically raised from and lowered against the work piece so that the backward movements of the hammer, which occur after the hammer descends to pound down the lip and while it is clamping the insole to the table 26, will effect a step-by-step feeding of the insole through the machine.

The press-er foot 44 is adjustably mounted on the outer end of an arm II4, which is pivoted to the frame by means of a stud H6, in the following manner: The foot is secured directly to a split block I I8 having a dovetail groove therein, and is adjustable vertically thereon by means of a screw I20 having a head engaging a notch I2I in the block. A binding screw I22 serves to close the dovetail and lock the presser foot in adjusted position. The block H8 is secured to a bracket I24 with the capability of horizontal adjustment by means of a locking screw I26, passing through a clearance hole in the block, while the bracket is similarly attached to the arm II4 for adjustment transversely of the work table by means of a locking screw I28. As will be apparent, the three adjustments provided make it possible to locate the presser foot in any desired position, heightwise, widthwise or lengthwise with respect to the work table, the edge gage and plow and the other operative elements of the machine.

The raising and lowering of the presser foot is effected by means of the eccentric block I00, which, as previously explained, is rotated by the main shaft, operating through a link and lever mechanism, now to be described, which is arranged so as to produce an appreciable dwell of the presser foot on the insole. It is during this dwell of the presser foot that the insole is held thereby while the hammer moves forward for its next feeding step. Mounted on a shelf I30, formed on the frame I4, is a bracket I32 carrying a fixed shaft I34 on which is J'ournaled levers I36 and I38, joined by a cross piece I40, see Figs. 1 and 7. The inner end of the arm II 4 is connected to the lever i38 through a link I42. A second link I44 is pivoted at its lower forked end to an eccentric strap I46 on a pin I48 and is connected at its upper end to the lever I36 by means of a self-alining joint comprising a ball I52 and a clip I50.

When the parts are in the position shown in Figs. 1 and 7 the eccentric block is in its uppermost position and the link I42 is positioned somewhat beyond the dead center position of the crank arm formed by the lever I38. The presser foot is now in its down position, clamping the insole to the table. As the main shaft is rotated the lever I36, and with it its connected lever I38, will be, turned in a clockwise direction during the first half-turn, and then returned to its ori inal position during the following half-revolution, through the action of the eccentric block and connecting parts I44 and I46. Because of the aforementioned dead-center position of the link I 42 practically no movement is imparted to the lever H4, or to the presser foot 44 carried by the forward end of this lever, during the first and last quarter turns of the main shaft as it is rotated from the position of Fig. 1, and whatever slight upward and downward movement of the presser foot in its down position as does occur is accommodated by the resiliency of the insole material.

However, during the intermediate half-turn, the presser foot is first elevated upward and away from th insole and then is again moved down against it. The orientation of the eccentric pin 98 with respect to the eccentric block I00 is such that the hammer is at this time moving backward and also pressing against the insole to clamp it to the table and impose a drag thereon. Hence, as soon as the presser foot, is elevated sufficiently the insole is released and moves backward with the hammer until the presser foot is again lowered to contact the insole with enough force to overcome the drag of the hammer. In Fig. 8 the head 68 is in mid-position and the backward movement of the hammer half completed.

The exact times at which the insole is gripped and released by the presser foot with respect to the backward movement of the hammer, and consequently the linear feeding movement of the insole, can be varied by the vertical setting of the presser foot. Thus, it is possible to set the presser foot to release and clamp the insole just at the instants when the direction of forward and backward movements of the hammer are reversed and a maximum feeding movement obtained. However, a slightly lower setting of the presser foot will delay the release of the insole until shortly after the hammer has started its backward movement and effect the clamping thereof by the presser foot before the backward movement has been completed. This will shorten the feeding movement somewhat but will cause the insole to be held securely at all times by the resulting slight overlapping of the gripping actions of the hammer and the presser foot thereon.

The eccentric block I also operates the wiper 50, hammer 52 and slashing knife 54, through the lever I36. The bracket 66 of the head 68 has an upwardly and forwardly extending web I60 carrying a boss I6I in which is secured, by means of a set screw I62, a cross-shaft I64 on which is journaled a forked lever I65 having two downwardly extending arms I66 and I68 and an upwardly extending arm I10, see Figs. 4 and 5. A link I12 connects the upper arm I to the lever I36, being secured to the former by a ball joint comprising a ball I14 and a clip I16 and to the latter by a ball joint comprising a ball I18 and a clip I80, see Fig. '7, to accommodate the swinging movements of the head 68.

The arm I68 is substantially triangular in shape and the wiper is adjustably secured to its forward side by means of a tongue-and-groove connection and a locking screw I84 threaded into the wiper blade and passing through a clearance slot, not shown, in the arm. The lower end of the wiper is rounded off at its forward or leading edge, as shown at I86, to facilitate the turning back of the channel lip as it is swung inwardly across the insole from the position it occupies in Fig. 1 to that which it occupies in Fig. 4. This swinging movement is imparted to the wiper by the rocking of the lever I65 through the action of the eccentric block I00, the link I44, the lever I36 and the link I12, as the main shaft I02 is r0- tated. As is illustrated in Fig. 4, the wiper turns the lip L of the insole S, which has been raised by the plow, back upon the adjacent surface of the insole above between-substance. After the lip is thus turned back it is struck a blow by the hammer 52 which is operated withthe-wiper in the following manner.

Referring to Figs. 2 and 5, the hammer 52 is adjustably mounted, by means of a tongue-andgroove connection and a locking screw I92, on the outer end of an arm I94 of a bell-crank lever I96 which is journaled on a cross-shaft I98 extending through and secured to the lower part of the bracket 66. The other arm. 200 of this bell-crank lever is slotted at 202 to receive a sliding block 284 having a trunnion pin 206 journaled in the lower end of the arm I66 of the forked lever I65. When the lever I 65 is rocked, through the action of the eccentric block I00, the lever I36 and the link I12, from the position shown in Fig. 1 to and from the position of Figs. 4 and 5, the hammer is caused to rise and fall, thus pounding the turnedback lip L in back of the wiper 50. This pounding action serves to set the lip in place as it is turned back by the wiper.

The arrangement of the lever I36 and the link I 12 and the throw of the eccentric block I00 is such that rotation of the main shaft through its first half-turn from the position of Figs. 1 and '7, swings the lever [36 and the link I 12 downwardly until they are in substantial alinement and a dead-center position of the crank formed by the lever I36 is reached, and also brings the eccentric I00 to its lower dead-center position. The parts are returned to their original positions during the next half-turn, and this cycle is repeated. As these dead-center positions are approached and passed, the lengthwise displacement of the link I12, and consequently the angular movement of the lever I65, for a unit angular movement of the main shaft, is very small during the period of the intermediate half.- turn. Accordingly, the wiper and the hammer 52 are first moved somewhat rapidly, inwardly and downwardly, to turn back and pound down the lip, see Figs. 5 and 6, during the first quarterturn of the main shaft from the position of Figs. 1 and 7, and while the insole is still held stationary on the table 26 by the presser foot as the edge gage and plow are completing their forward movement over the upper surface of the feather. During the next half-turn, the insole, which is now released by the presser foot, is fed by the backward movement of the hammer, which now occurs as the head 68 swings back, and the wiper and hammer complete the small remaining portions of their inward and downward movements and return slightly while moving backward with the edge gage and plow. This small downward movement of the hammer is accommodated by the resiliency of the material of the insole and also by a slight downward yielding of the table 26, and the wiper merely slides over the poundeddown lip. This continued pressure of the hammer, after it pounds the lip, greatly augments its setting action especially when the lip is thick or the material stiff or otherwise hard to work. In the final quarter-turn, the wiper and hammer are returned rapidly to the positions of Fig. l and, with the edge gage and plow, complete half of their forward movement. In this manner the operations of the hammer and the wiper occur while the insole is held stationary by the presser foot and at a time when movement of the swinging head relative to the stationary insole is slight, the eccentric pin 98 being near dead-center at this time, and, as the hammer and wiper move with the insole during feeding thereof, scuffing, or rubbing-up, of the leather on the turned-back lip, which would result from any appreciable relative movement of the wiper and hammer lengthwise with respect to the insole is avoided. Also, the pounding action of the hammer does not interfere with its feeding function or delay the feeding cycle which proceeds continuously without interruption.

As the hammer pounds down the turned-back lip, and also while the hammer applies pressure thereto during the feeding of the insole to further set the lip, the shoulder thus formed is supported by'the front edges of the edge gage and plow and also by the front edge of the web 41, see Fig. 5, and is thus prevented from bulging out toward the feather F. In this manner a straight and well-defined shoulder is produced. If desired, the web 41 may be omitted, the front faces of the edge gage and plow supporting the shoulder on each side of the hammer adequately for many kinds of stock. The thickness of the web is just a little less than the vertical height of this shoulder so that its top surface clears the hammer at all times, and the block 68 is readily removable from the rod 62, by loosening the screw 64, for replacement by other blocks in which the web 41 is of appropriate thickness to accommodate higher or lower shoulders on the work piece, as well as for the substitution of blocks 68 having specially shaped plow members, and/or edge gages, adapted for particular working conditions.

Means are provided for slashing the raised lip at selected locations around the insole, as, for example, in the shank portion near the ball line, to facilitate the turning-back and pounding-down operations. In the illustrated machine the slashing means comprises the knife 54, which is selectively operable by the lever I65, through operating mechanism now to be described, to slash the raised lip during a single operation of the wiper and hammer at any desired point along the lip, or to continuously slash the lip for a plurality of wiper and hammer actions. The knife is adjustably secured to an arm-like projection 2I2, forming a part of a plate 214 which is pivoted on the cross-shaft I98, by means of a clamping screw 2|6 passing through a clearance hole in the plate, see Fig. 4. The knife fits into a groove 2 I 8 formed on the inner side of the projection 2I2, as can be seen in Fig. 2. In the upper right-hand corner of the plate 2I4 is a rectangular notch 220, Figs. 3 and 4, into which projects a pin 222, driven into the bracket 66 and forming an anchorage for one end of a tension spring 224. The other end of this spring is attached to a pin 226, secured to the plate 2I4 adjacent its lower side. This spring normally holds the plate 2|4 in the position shown in Fig. 1, with the knife elevated well above the lip, as it is turned up by the plow 48, and with the pin 222 bearing against the inner side of the notch 228. The plate 214 is provided with a groove 238 in which is slidably mounted a trunnion block 232 having a trunnion pin 234 projecting therefrom. Journaled on the pin 234 and carried by the block 232 is an elongated latch-bar 236. A shouldered plate 238, having a rib 248 on its back face, is secured to the plate 214, with the aforementioned rib fitting in a groove 244, by means of screws 242 to hold the parts 232 and 236 in assembled relation, as shown in Figs. 1 and 4. A spring 246, connected between pins 248 and 258 on the latch-bar and plate 2 l4, respectively, pulls the latch downwardly so that the end portion of the trunnion pin 234, which projects through the latch-bar, rests normally in a semi-circular recess 252 formed in the top edge of the shouldered plate 238, see Fig. 6.

Also journaled on the cross-shaft I98 is a lever 254 having on its hub portion a camming surface 256 which terminates in a radial surface 258 dropping down to the periphery of the-hub portion. The lever 254 may be turned to selectively position the camming surface 256 in any one of the three different positions illustrated in Figs. 1, 4 and 6 by means ofa foot treadle, not shown, operating through the following mechanism. A link 268 is hinged to the end of the lever 254 and also connected, by means of a ball joint, to the upper end of a lever 262, which is journaled on a shaft 264 rotatably supported in a bearing formed in a projection 266 on the frame l2. A T-shaped lever 268, having oppositely extending arms 218 and 212, is fixed to the shaft 264 and connected to the lever 262 by means of a tension spring 214. The lever 262 has an outstanding abutment 216 which projects beyond a pin 218 carried by the lever 268, Fig. 2. A coil spring 288, anchored at one end to the projection 266 and at the other end in an adjusting collar 282, secured to the shaft 264, tends to turn this shaft in a counterclockwise direction, as viewed in Fig. 2. A chain 284, shown in part, is provided for connecting the lever 268 to the aforementioned foot treadle.

Adjustable abutment screws 286 and 288, provided with locking screws 285 and 281, are threaded through the ends of each of the arms 218 and 212, see Fig. 1, and when the treadle is released the spring 288 will turn the shaft 264 so as to swing the lever 262, in a clockwise direction (Fig. 1), until the abutment screw 286 strikes the face 388 of the frame I2. The cam 256 will now assume the position shown in Fig. 6, which, as will presently be explained, is the idle position of the knife-operating mechanism. On the other hand, if the treadle is depressed, with the adjustable abutment screw 288 in the position now shown, the lever 268 will be turned in a counterclockwise direction, Fig. 1, until the screw 288 strikes the front face 382 of the bracket 28, and through spring 214, will turn the lever 262 to position the cam 256 in the position shown in Fig. 1, in which position a single slash 3I8, Fig. 8, will be made on the next operation of the wiper and hammer. However, if the adjustable abutment screw 288 is turned so as to project somewhat further beyond the arm 212 the cam 256 will be arrested before it reaches the position of Fig. l, and instead will come to rest in the position shown in Fig. 4. In this position the knife 54 will be operated continuously with the wiper as long as the treadle is held down.

The lever I68 is provided with a latch-engaging abutment 298, adjustably secured thereto by means of a clamping screw 292 therein. This abutment is positioned so as to engage the upper end 384 of the latch-bar 236 and effect operation of the knife only when it is elevated, against the pull of the spring 246, by means of the action of the cam 256 on its lowermost surface 294.

With the parts in the positions shown in Fig. 6, the lower end 294 of the latch-bar 236 is held down against a circular portion of the hub of the lever 254 by the spring 246 and the abutment 298 clears its upper end 384. The plate 2l4 now remains in its upper position, with the forward end of the notch 228 held against the pin 222 by the spring, 224, and the wiper is swung in and out during the operation of the machine without operating the knife 54. The treadle, not shown, which'is connected to the chain 284 is at this time released and the spring 288 turns the shaft 264 so as toswing the lever 268 in a clockwise direction, Fig. 1, until arrested by the adjustable abutment screw 286 strikes the surface 388, to turn the lever 262, through the pin 218 and the abutment 216, so as to position the cam surface 256 as shown.

By depressing this treadle the cam surface 256 will be turned to the position shown in Fig. 1, by the rotation of the lever 268 which occasions a turning of the lever 262 through the spring 214. Now the abutment 298 will strike the upper end 384 of the latch bar 236 as the lever I68 is swung outwardly to operate the wiper 58, and the plate 2|4 will be turned in a counterclockwise direction, Fig. l, to swing the arm 2 I 2 and the knife 54, carried thereby, downwardly against the action of the spring 224, to the position shown in Fig. 4. Referring to Fig. 8, the knife is located in front of the plow and ahead of the wiper and hence cuts through the lip at a point where it is still standing up slightly above its fully turnedback position, as shown in Fig. 1. The knife thus operates ahead of the wiper so that the portion of the lip which is turned back by the wiper is freed from the remainder of the lip.

In this position of the plate 2I4 the lower end of the latch bar 236 will have passed slightly beyond the cam surface 256. However, the spring 246 is not strong enough to overcome the friction between the long fiat surface 306 on the latch bar and the shouldered plate, which are now pressed firmly together by the action of the abutment 290 against the upper end 304 of the latch bar, tending to turn the latch bar in a counterclockwise direction, Figs. 1 and 4, during the forcing of the knife through the lip. As soon as the lever I68 begins to swing back, after the completion of the wiper action and the slashing of the lip, this pressure of the surface 306 against the shouldered plate is reduced somewhat and sufficiently to allow the spring 246 to snap the latch bar quickly down into the position shown in Fig. 6. The lower edge 294 of the latch bar will then fall in front of the radial surface 258 and as the plate 2l4 turns back to its original position the latch-bar will rock on the trunnion pin 234. On the next inward movement of the lever I68 no turning of the plate 2 I4, and consequently no slashing of the lip, will occur, as the abutment 290 now clears the upper end 304 of the latchbar. This action will continue until the treadle is released and again depressed, whereupon another single slashing cut will be made. When the treadle is released, the lever 254 assumes the position shown in Fig. 6 so that the surface 294 rides up on the surface 256 as the plate 2I4 is pulled back by the spring 224. The spring 246 now returns the latch bar to normal position with its surface 306 held against the shouldered plate 238. Thus the operator can selectively cause the knife 54 to operate to cut a single slash in the lip at any point around the margin of the insole or can space slashes as desired.

When it is desired to produce a plurality of closely spaced slashes, as, for example, is illustrated in Fig. 8 at 3I0, the abutment screw 288 is positioned so that the depression of the treadle connected to the chain 284 will place the cam surface 256 in the position shown in Fig. 4. Now the lower end of the latch bar does not pass beyond the radial edge 258 of the cam 256 as the plate 2I4 is swung to operate the knife and the latch bar is thus held elevated for engagement by the abutment 290 on each operation of the wiper. With this setting of the cam the knife operates continuously and with each action of the wiper so long as the treadle is held down.

It will be observed that the manner of connecting the lever 268 to the lever 262 through the spring 214 prevents the jamming of the parts which might otherwise occur should the treadle connected to the lever 268 happen to be depressed while the abutment 290 is over the upper end of the latch bar. Under these circumstances the spring 214 will yield, thus arresting movement of the lever 262 and preventing further turning of the lever 254, until the lever I68 and its abutment 290 returns to the position shown in Fig. l, whereupon the lever 262 is turned by the spring 214 to set the cam surface 256 and to elevate the latch bar so that its upper end 304 is in front of the abutment 290.

The operation of the illustrated machine will be apparent from the foregoing description of its construction and the explanation of the manner in which its component parts function. Briefly, it is as follows: The work piece to be operated upon, for example, the insole S, is placed on the table 26 and inserted beneath the presser foot 44 while the work table 26 is held down by means of the treadle, not shown, which is connected to the chain 42. A portion of the outer lip L is turned up and the shoulder thus formed is pressed against the front edges of the edge gage 46 and plow 48, This treadle is now released, allowing the work table to rise until arrested by the engagement of the stop collar 36 against the abutment sleeve 40. The insole S is now clamped to the top surface of the work table, either by the presser foot or hammer, depending upon the position of the drive shaft. Upon rotation of the drive shaft the edge gage and plow slide back and forth over the surface of the feather F and the extension thereof at F, to raise the lip, and the insole is fed along by the backward movement of the hammer when the presser foot 44 is elevated. Just prior to each feeding stroke of the hammer the raised lip is first turned back by the wiper 50 and then pounded down and set by the hammer 52, in the manner explained in detail above. By means of these three instrumentalities, and the pressing action of the latter during the feeding mov'e- V ment of the insole, even the thickest lips of stiffest material are satisfactorily handled. If slashing of the rib is desired the other treadle, connected to the chain 284, is depressed and, depending on the setting of the abutment screw 288, either a continuous or single slashing action by the knife 54 is effected.

As the insole passes through the machine the operator may guide it somewhat to hold the shoulder of the lip against the front edges of the edge gage and plow, especially when the curvature of the shoulder is abrupt, as in the toe portion of the insole. However, as has been pointed out above, the action of the presser foot, and also that of the table during the feeding stroke of the hammer, tends to throw this shoulder against their front edges so that the insole is, for the most part, automatically guided by the machine and very little effort is required on the part of the operator.

The presser foot knife and wiper are each adjustable vertically, and the edge gage and plow are yieldingly held in their vertical positions by the spring I8. The hammer, however, is not adjustable in a vertical direction and thus forms a fixed point for the adjustment of the work table for various thicknesses of work pieces. This ad-' justment is obtained by the abutment sleeve 40 which is set so that the harmner, in its down position, exerts the desired clamping action on the insole when the table is in its uppermost position, as determined by the stop collar 36. If desired, the clamping pressure of the hammer can be increased by backing-off the collar 36 slightly so that the hammer depresses the table against its strong supporting spring. With the table thus set to the hammer the other operative elements are adjusted to conform there to for the par ticular work pieces to be handled.

The eccentric block I00 is provided with a balancing flange 3 which is arranged to dip in a body of lubricant, contained in the chamber I4. As the main shaft I02 rotates, lubricant which collects on the flange is thrown upwardly to fall over the various moving parts within the chamber. Some of the lubricant eventually flows down through ducts 330 and 332 in shaft 82 and between it and the swinging head 68, which is journaled thereon. The upper end of the thrustbushing 86 is flanged at 3I4 to collect lubricant and has a notch 3 I 6 discharging into a recess 3l8 which also catches lubricant working out along th nose 90. A return duct 320 leads lubricant from this recess back into the chamber. Suitable filling, draining, and overflow plugs 322, 324 and 326 are provided. An adequate supply of lubricant to the moving parts is thus assured.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent of the United States is:

1. A lip-turning machine having, in combination, a work support, guide means for engaging the lip and shoulder of a channeled insole, said means comprising an edge gage and a plow for raising the lip as the insole is fed through the machine, said edge gage and said plow being spaced apart, a wiper for turning back the raised lip, and a hammer for pounding and pressing down the turned-back lip on the adjacent surface of the insole above the between-substance, said hammer being arranged to engage the turnedback lip between the plow and the edge gage so that the shoulder of said channel is supported by said edge gage and plow against outward bulging during the action of the hammer.

2. A lip-turning machine having, in combination, a work support, guide means for engaging the lip and shoulder of a channeled insole comprising an edge gage and a plow for raising the lip of the channel as the insole is fed through the machine, said edge gage and plow being spaced apart in the direction of feed of the insole, a hammer arranged between the edge gage and the plow and movable toward the insole for pounding and pressing the turned-back lip to set it against the adjacent surface of the insole above the between-substance, and a web extending between the edge gage and the plow to provide an abutment surface for supporting the shoulder of said channel during the operation of the hammer.

3. A lip-turning machine having, in combination, a work support, means for engaging the lip and shoulder of a channeled insole comprising an edge gage and a plow for raising the lip of the channel as the insole is fed through the machine, said edge gage and plow being spaced apart in the direction of feed of the insole and yieldingly pressed against the feather of the insole, a wiper movable across the insole for turning back the raised lip, a hammer arranged between the edge gage and the plow and movable toward the insole for pounding down the turnedback lip to set it against the adjacent surface of the insole above the between-substance, and a web extending between the edge gage and the plow to form a vertically extending abutment surface continuous with the front edges of said edge gage and said plow, said. abutment surface functioning to support and maintain straight the shoulder of said channel during the operation of said hammer.

4. A lip-turning machine having, in combination, a work support, a means for yieldingly engaging the feather of a channeled insole comprising an edge gage and a plow, said edge gage and plow being constructed and arranged to engage the shoulder of the channel of said insole as it is fed through the machine, means for turning back the lip of said channel as it is raised by said plow,

and means for pounding down said turned-back lip to set it down on the adjacent surface of said insole above the between-substance, said turning-back means and said pounding-down means being arranged to operate on that portion of the lip which is between said edge gage and said plow so that the shoulder of said channel is supported thereby during the action of said pounding means.

5. In a lip-turning machine having a work support and means for setting the lip of a channeled insole down on the adjacent surface of the insole above the between-substance thereof, the combination of an edge gage and plow arranged one on each side of the setting means and provided with a connecting web extending between the edge gage and the plow to form a vertically extending abutment surface continuous with the front edges of said edge gage and said plow.

6. In a lip-turning machine having a work support and means for setting the lip of a channeled insole down on the adjacent surface of the insole above the between-substance thereof, the combination of an edge gage and a plow for engaging the shoulder of a channeled insole and for raising the lip of the channel as the insole is fed through the machine, said edge gage and plow being detachably mounted on an element that is yieldably supported in the machine and also being arranged for movement to slide over the feather of the insole for yieldingly pressing against the insole while the insole is supported on said work support during the operation of the machine.

7. A lip-turning machine having, in combination, a work table, means for imparting step-bystep feeding movements to an insole supported on the table, means for clamping the insole against the table between feeding movements thereof, and means for turning back and pounding down a channel lip of the insole as it passes through the machine, said means comprising a wiper and a hammer each constructed and arranged to operate on the channel lip while the insole is held stationary by the clamping means and to thereafter move with the insole during its feeding movements.

8. A lip-turning machine having, in combination, a frame, a work table rotatably mounted on the frame, a head swingable on the frame and projecting outwardly toward and above the work table, means for swinging the head to impart step-by-step feeding movements to an insole supported on the table, means carried by the frame for clamping the insole against the table between feeding movements thereof, means for operating on a channel lip of the insole While it is clamped against the table between feeding movements, said operating means being mounted on the swinging head for movement with the insole during feeding movements thereof.

9. A lip-turning machine having, in combination, a frame, a work table rotatably mounted on the frame, a head Supported in the frame for swinging movement over the table, means for swinging the head to impart step-by-step feeding movements to an insole carried by the table, means on the frame for clamping the insole against the table between feeding movements thereof, means for operating on a channel lip of the insole while it is clamped against the table, said means comprising a wiper for turning back the lip, a knife for slashing the lip, and a hammer for pounding down the lip onto the adjacent surface of the insole above the between-substance,

said wiper, knife and hammer being mounted on the swinging head for movement therewith and with the insole during feeding movements thereof.

10. In a lip-turning machine having a work table and means for imparting step-by-step feeding movements to an insole supported on the table, the combination of a wiper for turning back a channel lip of the insole operable between feeding movements thereof, and means for positively moving said wiper with the insole during ee movements thereof.

11. In a lip-turning machine having a work table and means for imparting step-by-step feeding movements to an insole supported on the table, the combination of a knife for slashing a channel lip of the insole operable between feeding movements thereof, and means for positively moving said knife with the insole during feeding movements thereof.

12. A lip-turning machine having, in combination, a frame, a flat circular work table rotatably mounted on the frame with its inside edge spaced a considerable distance from the front of the frame to provide a clearance space therebetween for projecting portions of work pieces, a head mounted in the frame for swinging movement parallel to the plane of the table and having a forwardly projecting portion extending outwardly therefrom and over the table, and a plurality of tools carried by the head and arranged to operate on a channel lip of a work piece supported on the table.

13. A lip-turning machine having, in combination, a frame, a flat circular work table, means for rotatably mounting the work table on the frame comprising a thrust bearing and a supporting means therefor, said supporting means comprising a post offset inwardly of the center of the table and beneath that portion of the thrust bearing which supports the inner part of the table, and means carried by the frame for operating on a channel lip of a work piece supported on the table.

14. A lip-turning machine having, in combination, a frame, a bracket projecting outwardly from the front of the frame, a flat circular work table rotatably mounted on the bracket with its inside edge spaced a considerable distance from the front of the frame to provide a wide clearance space therebetween, a head mounted on the frame for swinging movement parallel to the plane of the table having a forwardly projecting portion extending across the clearance space and above the inner portion of the table, and a plurality of tools carried by the projecting portion of the head for turning the channel lip of a work piece supported on the table and located beneath the forwardly projecting portion of the head.

15. A lip-turning machine having, in combination, a rotatable work table, a movable head, a lip-setting means mounted on said head and arranged to strike the raised lip of a channeled work piece supported on the work table, means for moving the head back andforth during the operation of the lip-setting means sothat the work piece is fed through the machine by the lip-setting means, and means operating in timed relation to the action of said lip-setting means for clamping the work piece to the table between the strokes of said means on the lip.

16. A lip-turning machine having, in combination, a frame, a freely rotatable work table, a

presser foot mounted on the frame and arranged periodically to hold a work piece stationary on the table and then to release it for movement with the table, a swinging head carried by the frame and having a lip-setting means for pounding down a channel lip on the work piece while it is held by the presser foot, and means for swinging the head-to move the lip-setting means laterally, said swinging means operating in time relation to the action of the presser foot so that the lateral movements of said setting means feeds the work piece through the machine.

1'7. A lip-turning machine having, in combination, a frame, a freely rotatable work table, a presser foot mounted on the frame for engaging a work piece to hold it stationary on the table, means for operating the presser foot periodically to release and hold the work piece, a swinging head carried by the frame and having a lip-setting hammer mounted thereon, means for operating the hammer to strike a channel lip on a work piece supported on the table, said means being arranged to produce a substantial dwell of the hammer on the lip at the end of each downward stroke thereof, and means for operating the swinging head to move the lip-setting hammer. laterally back and forth over the table, said several operating means being constructed and arranged to operate in such a manner that the lipsetting hammer moves back during its dwell on the lip, and while the work piece is released for movement thereby by the presser foot, to effect a feeding of the work piece by the lip-setting hammer and also so that the hammer strikes the channel lip while the work piece is being held by the presser foot.

18. A lip-turning machine having, in combination, a frame, a freely rotatable work table, a presser foot mounted on the frame, means for operating the presser foot periodically to hold a work piece stationary on the table and then to release it for movement therewith, said means comprising an eccentric and a linkage mechanism constructed and arranged quickly to raise and lower the presser foot and to hold it substantially motionless in its lowermost position and in holding engagement with the work piece, a lip-setting means for pounding down a channel lip on the work piece, means for operating the lip-setting means comprising a second linkage mechanism associated with said eccentric and arranged to produce a substantial dwell of the lip-setting means on the lip near the end of each downward stroke thereof, and means comprising a second eccentric for imparting backward and forward movements to said lipsetting means, said eccentrics being fixed with respect to each other and arranged so that upon rotation thereof the lip-setting means operates to pound the lip while the presser foot is holding the work piece stationary on the table and thereafter moves backward during its dwell on the lip to feed the gvoilk piece when it is released by the presser 19. A lip-setting machine having, in combination, a frame, a lip-setting hammer for pounding down the lip of a channeled Work piece on the adjacent surface of the work piece, said hammer being arranged to strike the lip a sharp blow and to then dwell thereon for an appreciable period before starting its return stroke, a freely rotatable work table on said frame for supporting a work piece during the action of the hammer, and means for moving the hammer laterally across the table during its dwell on the lip to thereby impart a feeding movement to the work piece, said table being adjustable heightwise with respect to the hammer and yieldable away therefrom to accommodate slight downward movements of the hammer occurring during the said dwell period and while the hammer is moving laterally to feed the work piece.

20. A lip-turning machine having, in combination, a rotatable work table, clamping means arranged periodically to hold a work piece stationary on the table and then to release it for feeding movement, means for turning back a channel lip of the work piece and means for setting the turned-back lip down on the adjacent surface of the work piece, said lastnamed means comprising a hammer arranged to move laterally while engaging the lip, at the end of each of its downward strokes, to impart a stepby-step feeding movement to the work piece when it is released by the clamping means, the lipturning means being arranged to operate while the work piece is held by the clamping means and thereafter to move laterally with said hammer so as to follow the work piece during feeding movements thereof.

21. A lip-turning machine having, in combination, a freely rotatable work table, means for holding a work piece stationary on the table and then releasing it for feeding movement, a swinging head movable over a portion of the table and having a lip-setting setting hammer operable to set a channel lip on the work piece while it is held stationary by said holding means and to remain in engagement with the lip for feeding the work piece during movement of the head when the work piece is released by the holding means, and a wiper mounted on the head arranged to turn back the channel lip for the action of the lip-setting hammer while the work piece is being held stationary, said wiper also being arranged to move with the work piece during feeding movements thereof by said hammer.

22. A lip-turning machine having, in combination, a freely rotatable work table, a movable head, a plow for raising the lip of a channeled work piece supported on the table, a lipturning means on said head for turning back the lip as it is raised by the plow, a lip-setting means mounted on the head and arranged to strike the turned-back lip and pound it down on the adjacent surface of the work piece, means for moving the head backward and forward over the work piece, said means operating in timed relation with the strokes of said lip-setting means in such a manner that feeding movements are imparted to the work piece by said lip-setting means at the end of each downward stroke thereof and during the backward movement of the head, and means for holding the work piece to raise the channel lip as the head moves forwardly while the work piece is held stationary by the clamping means.

24. A lip-turning machine having, in combination, a work support, clamping means for periodically holding a work piece stationary on the support and then releasing it for feeding movements, a head movable backward and forward over said support having means for engaging a channeled work piece to feed it during backward movements of the head when said work piece is released by the clamping means, a plow carried by said head and arranged to yieldingly bear against the work piece so as to raise the channel lip during forward movement of the head while the work piece is held stationary by the clamping means, and means mounted on the head for turning back and pounding down the lip after it is raised by said plow, said lastnamed means being arranged to operate prior to each backward movement of said head and to thereafter move therewith during the feeding of said work piece.

25. A lip-turning machine having, in combination, a rotatable work table, guide means for engaging a work piece positioned on the table, means for feeding the work piece in step-by-step movements, and means including a presser foot constructed and arranged for movement against the work piece and laterally of the table during the operation of the machine to hold the work piece against the table between said feeding movements and to urge the work piece toward said uide means during its progress through the machine.

26. A lip-turning machine having, in combination, a rotatable work table, guide means comprising an edge gage and a lip-raising plow adapted to engage the shoulder of a channeled work piece on the table, means for imparting step-by-step feeding movements to the work piece, and means for holding the work piece between said feeding movements comprising a pivoted presser foot arranged to move downwardly into engagement with the work piece and inwardly toward the guide means during the operation of the machine and prior to each feeding movement of the Work piece whereby the shoulder of the work piece is automatically held against the edge gage and plow during its progress through the machine.

27. A lip-turning machine having, in combinable mounted on the front of the frame, a swingstationary on the table between said feeding movements, said plow being carried by the head forward movement of the head and raise the lip while the work piece is held stationary by the holding means.

23. A lip-turning machine having, in combination, a rotary work support, clamping means for periodically holding a Work piece stationary on the support and then releasing it for feeding movement, a head movable backward and forward over said support having means for engaging a channeled work piece to feed it during backward movements of the head when the work piece is released by the clamping means, and a plow carried by said head, said plow being arand arranged to slide over the work piece during I able head having guide means thereon arranged to extend over the upper surface of the table on the side nearest to the frame and to engage a work piece supported on the table for positioning the channel and its lip with respect to the head, means on the head for periodically engaging the work piece to clamp it to the table and to impart step-by-step feeding movements thereto during swinging movement of the head in one direction,

ranged to yieldingly bear on the work piece and T6 and means on the frame for holding the work piece stationary on the table during swinging movement of the head in the opposite direction and between feeding movements of the work piece, said holding means being arranged to urge the work piece toward the guide means between feeding movements thereof and said table rotating during feeding movements of the work piece to exert a drag on the work piece tending to swing it toward the guide means.

28. A lip-turning machine having, in combination, a plow, lip-turning means operable to turn the lip of a channeled work piece, lip-setting means for pounding down the turned lip, and means for slashing the turned lip comprising a knife and operating means therefor, said operating means being constructed and arranged for selective control to effect a Single slashing cut by said knife at any point along the lip, to produce a slashing cut by said knife with each operation of the lip-turning means, or to discontinue the action of said knife.

29. A lip-turning machine having, in combination, a work support, a plow for raising the lip of a channeled work piece on the support, a head having lip-turning tools associated therewith including a lip-turning wiper, a lip-setting hammer, a lip-slashing knife pivotally mounted on the head for swinging movement toward the lip of the channeled work piece to slash the lip, means for operating the wiper, and means for operatively connecting the knife to the wiperoperating means, said connecting means being arranged for selective control so as to effect a single slashing cut by said knife at any point along the lip, to produce a slashing cut by said knife with each operation of the lip-turning means, Or to discontinue the action of said knife.

30. A lip-turning machine having, in combination, a work support, a head, a lip-turning wiper pivoted thereon for swinging movement over a channeled work piece on the support to turn the channel lip, a lip-slashing knife pivoted on the head for swinging movement to slash the lip as it is turned by said wiper, a projection connected to the wiper and movable therewith, and means associated with the knife and projectible into the path of movement of said projection for selectively connecting the knife to the wiper for operation therewith.

31. A lip-turning machine having, in combination, a work support, a head, a pivoted lever mounted on the head and carrying a lip-turning tool, means for swinging the lever to operate the tool, a knife-carrying lever also pivoted to the head and having a lip-slashing knife thereon, a projection on the first-named lever movable therewith, an abutment on the knife-carrying lever arranged to be moved outwardly into the path of movement of the projection, spring means normally holding said abutment inwardly and out of the path of movement of the projection, and control means for selectively projecting the abutment outwardly into the path of movement of the projection for operatively connecting the knife-carrying lever to the first-named lever.

32. A lip-turning machine having, in combination, a work support, a head, a pivoted lever mounted on the head and carrying a lip-turning tool, means for swinging the lever to operate the tool, a knife-carrying lever also pivoted to the head and having a lip-slashing knife thereon, a

projection on the first-named lever movable therewith, an abutment on the knife-carrying lever arranged to be moved outwardly into the path of movement of the projection, spring means normally holding said abutment inwardly and out of the path of movement of the projection, and control means for selectively projecting the abutment outwardly into the path of movement of the projection for operatively connecting the knife-carrying lever to the first-named lever, said control means comprising a rotatable cam adapted, in one position, to hold said abutment in its outward position and, in another position, to release the abutment for inward movement by the spring means.

33. A lip-turning machine having, in combination, a head, a wiper-carrying lever pivoted to the head, means for swinging the lever to operate the wiper, a projection carried by the lever and movable in an arcuate path during operation of the wiper, a knife carrier pivoted to the head and having a lip-slashing knife attached thereto, means for operatively connecting the carrier to the lever, said means comprising an elongated latch bar slidably mounted on the carrier and having an upper end adapted to be engaged by the projection on said lever, means including a cam rotatable about the pivotal axis of the knife carrier for projecting and retracting the latch bar, and manual control means for selectively positioning said cam so that the latch bar is projected to effect a single slashing cut by said knife and then withdrawn, to produce a slashing cut with each operation of the wiper, or to retract the latch bar for discontinuing the action of said knife.

34. A lip-turning machine having, in combination, a head, a wiper-carrying lever pivoted to the head, means for swinging the lever to operate the wiper, a projection carried by the lever and movable in an arcuate path during operation of the wiper, a knife carrier pivoted to the head and having a lip-slashing knife attached thereto, means for operatively connecting the carrier to the lever, said means comprising an elongated latch bar slidably mounted on the carrier and having an upper end adapted to be engaged by the projection on said lever, a control cam for the latch bar rotatable about the pivotal axis of the knife carrier for projecting and retracting the latch bar, and manually controlled means for said cam, said manually controlled means including a connection arranged to yield when said cam is rotated to project the latch bar against the projection and subsequently to complete the rotation of the cam to project the latch bar in position in front of the projection.

FREDERIC E. BERTRAND.

the casei the Patent Office.

CERTIFICATE (F CORRECTJiON. Patent No. 2,299,788. October 27., 19m. r FREDERIC E. BERTRAND.

It is hereby certified that error appears in the. printed specification of the above dumber-ed patent requiring correction as foilows: Pageh, first column, line '6, for "linear" read l-ineal page 7, first'column, line 69, strike out "a" oeijore "mean's'h page 8, s' econd column, line 51, claim 17, strike 'out "thereby and that the said .Lettrs Patent should be read with this correction therein that the same may conform to the record of signed and sealed this 5th day of January, A. D. 1914.5.

Henry Van Aredale, (Seal) Acting Commissioner of Patents; 

